Telegraphic transmitter.



No. 799,817.- TATENTED SEPT. 19, 1905. E. WOLTERS. TELEEEATETG TRANSMITTER.

APPLICATION FILED SEPTY 20, 1904.

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PATBNTED SEPT. 19, 1905.

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whew a, Gamm co wm STATES UTTE Riel-IARD WOLTERS, OE DSSELDORF, GERMANY.

TELEGRAPHIC TRANSMITTER.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed September 20, 1904. Serial No. 225,170.

To @ZZ whom t may concern:

Be it known that I, RICHARD WOLTERS, a citizen of Germany, residing at Dsseldorf, Germany, have invented new and useful Improvements in Telegraphic Transmitters, of which the following is a specification.

The present invention relates to an instrument which is operated likea ty pe-writer and serves to transmit the telegrams composed of `dots and dashes in accordance with the Morse code, so that a single touch on one of the keys will produce the sign or series of signs corresponding to that key.

The distinctive feature of the new transmitter in comparison with those hitherto known is that the pivoted slides, provided with short and long contact faces in the known manner, bear upon a common rail and that when they slide on the contact-rail in consequence of a pressure on the keys they gradually turn on their fulcrum or pivot, so that during the return motion, taking place after the keys have been released, the said slides immediately recede from the contactrail and that before their return motion is completed they impinge against a stop-pin and are thereby again caused to approach the contact-rail in the known manner.

In the accompanying drawings, Figures l and 2 are vertical sections of a transmitting instrument embodying my invention and showing one of the keys, together with the corresponding contact-slide and intermediate mechanism, Fig. l showing the key in its normal elevated position or position of rest and Fig. 2 the same after it has been depressed. Fig. 3 is a side view, partly in section, of a modification of the invention; Fig. 4L, a similar view of a further modification; Fig. 5, a detail of Fig. 4; Fig. 6, a side view, partly in section, of a still further mod-ification; and Fig. 7, a front view of Fig. 6.

The keys t are arranged like those of a type-writer. The contact-slides or sliding bars s are covered with non-conducting material Z at the places where they touch the contact-rail c in the position of rest and also when inmotion, which material is, however, interrupted in the known manner with metallic contact-faces corresponding to the signs of the Morse code, as usual. The sliding bars s are connected with alsource of electric current through the fulcrum of the keys or otherwise. The common contact-rail c is connected with the opposite pole of the same source of current, and the contact-slides s and rail c serve to close the electric circuit. If one of the keys t is depressed, thebar s,

connected with the same, slides over the rail c. The electric circuit is closed every time when one of the metal faces of the said bar touches the rail, and it is broken when a nonconducting part of the bar slides on the rail or rests on the same. Instead of interrupting the contact-faces by the insertion of a non-conducting material the sliding bars s may have recesses Which interrupt the conducting-faces.

Each of the sliding bars s is pivoted to a separate lever Zz and held in the required position on the lever by a weak spring f, fixed to the same, preferably by inserting one end of the spring into a slot formed in the lever. The free end of the spring rests against one of two oblique faces si S5, formed on the pivoted end or tailpiece of the slide s, so that the spring may maintain the slide in either of its eXtreme positions, Figs. l and 2, inthe same manner as the blade of a pocket-knife is held by the retaining-spring. The lever /L has its fulcrum between two ends at`cZ (thus constituting a two-armed lever) and is connected with the key-lever f by a short link g.

If the instrument-is in the position shown by Fig. 1, a pressure on the key Z will place it in the position shown by Fig. 2 and will cause the slide s to rise. During this motion its fulcrum, which is situated sidewise of the vertical plane passing through the axis of the rail c, will approach the same, and the slide s (which had formed an acute angle with the lever ZL) is caused to turn relatively to the lever L, so as to form an obtuse angle with the same, and as the spring f tends to maintain the slide s at this angle (by pressing with its extremity on the oblique face of the slide s) the slide .s will recede from and be clear of the rail c as soon as its return motion commences. My invention therefore dispenses with the use of a special device which had -hitherto been necessary for removing the with two Morse signs or letters arranged one IOO below the other. If the lower letter is to be transmitted, the key u is depressed to swing the upper rail c off the slide, while the lower rail o is swung forward so as to contact with the latter. In this way the lower Morse sign of slide s will by depression of key t be caused to glide along rail c', While the upper Morse sign will clear the rail c. If the upper Morse sign is to be transmitted, the key u is released to rlzause the upper Morse sign to glide alOng rai o.

In Figs. 4 and 5 the rail o2 may be rocked by a key-lever o, which is connected thereto by link c and arm @2. The rail c2 is embraced by an insulating-shell o, which is partly open to expose a pair of contacts 0 and p, arranged sidewise and below one another. The slide s carries two Morse signs placed side by side, the distance between said signs corresponding to the lateral distance between contacts 0 and p. If the lever o is in its normal position, the first of the Morse letters on slide .sI will engage contact o, while the second letter clears contact p, Fig. If lever o is depressed, the contact o is swung upward to clear its letter, while the contact. p is brought into contact with its letter.

In Figs. 6 and 7 the slide s is provided with three letters s s2 s3, which are arranged side by side. by axially shifting shaft o may be brought into alinement with either one of the letters. The rail ot is operated by a shipping-lever t", mounted upon rock-shaft g, carrying arm t'. This arm has a pin 2, embraced by the diverging slots of a pair of levers w 202, having The rail c4 has a contact e, whichI keys w3 co4. Normally the contact .e is opposite central letter s2. By depressing key w3 the contact .e is brought opposite letter s, while by depressing key 1f..74 the contact is brought opposite letter s.

What I claim is- 1. In a telegraphic transmitter, the combination of a contact-rail with a key-operated slide having insulated sections and a pair of oblique faces, and with a spring adapted to engage either one of said faces, substantially as specified.

2. In a telegraphic transmitter, the combination of a contact-rail with a key-operated slide having insulated sections and a pair of oblique faces, a spring adapted to engage either one of said faces, and a stop adapted to engage the slide, substantially as specified.

3. In a telegraphic transmitter, the combination of a contact-rail with a slide having a pair of oblique faces, a spring adapted to engage either of said faces, a lever to which the slide is pivoted, a stop engaging the slide, and a key pivoted to the lever, substantially as specified.

4. In a telegraphic transmitter, the combinationv of a contact-rail with a slide having a plurality of Morse signs and a pair of oblique faces, and with a spring adapted to engage either of said faces, substantially as specified.

Signed by me at Dsseldorf, Germany, this 6th day of September, 1904.

RICHARD WOLTERS.

Witnesses:

PETER LIEBER, ERNEST ANDRE. 

